Duf Is King

Duf Is King

dufUnit I: Electrostatics (Periods 25)
Electric Charges; Conservation of charge, Coulomb’s law-force between two point charges,
forces between multiple charges; superposition principle and continuous charge distribution.
Electric field, electric field due to a point charge, electric field lines; electric dipole, electric
field due to a dipole; torque on a dipole in uniform electric field.
Electric flux, statement of Gauss’s theorem and its applications to find field due to infinitely
long straight wire, uniformly charged infinite plane sheet and uniformly charged thin
spherical shell (field inside and outside).
Electric potential, potential difference, electric potential due to a point charge, a dipole
and system of charges; equipotential surfaces, electrical potential energy of a system of
two point charges and of electric dipole in an electrostatic field.
Conductors and insulators, free charges and bound charges inside a conductor. Dielectrics
and electric polarisation, capacitors and capacitance, combination of capacitors in series
and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium
between the plates, energy stored in a capacitor. Van de Graaff generator.
Unit II: Current Electricity (Periods 22)
Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility
and their relation with electric current; Ohm’s law, electrical resistance, V-I characteristics
(linear and non-linear), electrical energy and power, electrical resistivity and conductivity.
Carbon resistors, colour code for carbon resistors; series and parallel combinations of
resistors; temperature dependence of resistance.
Internal resistance of a cell, potential difference and emf of a cell, combination of cells in
series and in parallel.
Kirchhoff’s laws and simple applications. Wheatstone bridge, metre bridge.
Potentiometer - principle and its applications to measure potential difference and for...